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River, northern central U.S. Rising in eastern Wyoming, it flows northeast 527 mi (850 km) to join the Missouri River in central South Dakota. Angostura Dam, part of the Missouri River basin irrigation project, is on the river near Hot Springs, S.D.
This entry comes from Encyclopædia Britannica Concise. For the full entry on Cheyenne River, visit Britannica.com.
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